Limit horizontal displacement of masonry arch on spreading supports
DOI:
https://doi.org/10.3989/ic.82665Keywords:
Limit displacement, masonry arches, collapse mechanism, spreading supportsAbstract
The safety of masonry arches is heavily related to possible displacements that may occur at supports. These movements can be outwards or inwards, with a consequent, respectively, increase or decrease of the horizontal thrust. This process may strongly reduce the safety of a masonry structure, and even lead to its collapse. Despite the importance of this phenomenon, the bibliography is scarce and mainly focused on arches with circular shapes. This paper presents the development of a tool to estimate the outward horizontal support movements necessary to cause collapse for masonry arches of any shape considering, if needed, the existence of a backfill. Next, this work illustrates a parametric analysis to study the effect of support displacements on masonry arches with different shapes and several thickness/span ratios. This results in the construction of very useful plots for the professional practice. Finally, the methodology is applied to a real case of study.
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